Sucker-rod puller.



J. B. DUNLAP & W. I). BRYAN.

SUCKER ROD FULLER.

APPLICATION FILED' AUGJS. I914.

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J. B. DUNLAP & W. D. BRYAN.

SUCKER ROD FULLER.

APPLICATION FILED AUGJB, 19H.

Patented July 20, '1915.

2 SHEETS-SHEET 2.

A TTOR/l/EYS COLUMBIA PLANOGRAPH co onuthe {line '12 '72 1 of "Fig. i ,1 looking in directionwof the arrows adj acent to :the line,

thenarrows adjacent :to the line,

end of the well casing,

tions i are approximately; parallel.

JOSEPH 1B. DUNLAP AND WILLIAM D BfRYAN, 0F TULSA, OKLAHOMA.

I SUGKER ROI) "PULLER.

Specification of Letters Patent.

Patented July 20, 1915.

Application-filedAugust 415, 1914. Serial-No..856,974.

Toallwhom itrmay concern:

rBe it known that W8,. Josnrrr B. DUNLAP and WJDZ-LIAMMDY. .BRYAN, citizens of the United fitates, and residents of Tulsa, ,in the county of Tulsa and State of \Oklahoma, have made certain new and useful Improvements :in :Sucker ltod Pullers, of which :the following; is a specification.

Our invention ;is i an "improvement in sucker rod pullers, and'has for its vobjectto provide a device-,ofjthe character specified for pulling a sucker-rod from a-twellcasing, wherein a) plurality of gripping mechanisms is provided ;one 0f which, may loe attached toqthe well casing andlthe o'therto the pump ing f]ackyitnd:WllGIQlIhlillGxSfild devices are arranged'toi grip {the sucker trod alternately.

,In {the drawings: Figure 11 is aside view of the improved pul1er,:liig.;2 is a section @the l ig; 3 is-ai-vtopwplan view of the lower clampingzdevice,-Fig. 4 isa section on therline HtOf FigB-looking in the direction of and-Fig. 5 :isa front view oftoneof the gripping jaws.

The present embodiment of the invention is -:shown ;in connection :with ,an ordinary pumping jack, comprising a base 1, stand- ;ards: or 2 uprights 2, and levers 3 .which are pivoted t0 :the tops of the standards, as indi- :cated rat 1 it. The pumping jack is shown arrangedinear the upper endqof the well-casing 5, land the sucker rod 6 =is-shown as extending into the casing.

A r clamping device ,is provided for engaging the upper end of the well casing, the said device {comprising ,opposed curved plates 7 and 7 which fit aroundthe upper and are clamped thereon by .means oflooltsand nuts: 8. At

their: lowerendrthesections rest upon a union 9IWlIiCh COI1IIGCl3S two sections of well casing, and aboveythewwe'll casing-each of @the ,sections is provided withan angular: extension '10. These-extensionseach consistof a horizontal and a vertical portion, and.;the

vertical aportions are offset outwardly from and thesaidpor- Each of is provided with: an out the planes of the plates,

the: said portions wardly extending'flange 11. Tl1e gripping devices are alike,

:as far as concerns the gripping mechanism proper. ;The said devices differ only in the manner of their supplate below the gripplng port,.the: 1ower being supported by the well casmg andthe upper by the levers 3. Each ofithei :sa1d gripping devices comprises a baseplate 12, ,andthebase. plate ofthe lower gripplng device. isconnectedlwith the flanges 11 meansrof bolts '13, and the ,said 7 plate .12 si-providedwith acentral opening 1a, in WlllGh -'-is arranged the grippingmechanism ito be described. Thejsaid mechanism comprises apair ofsubstantially triangular jaws 15- each of which-isprovided atwone angle withsoppositely extending journal pins 16, andthesaidpins engages notches or recesses '17 -in;the upper face ofthe plate at the ends of the central opening 14. The jaws are thusmounted to rock on the journal pins, andeach awisrecessed on the face opposite to the angle provided with journal pins, as indicated at 18, to receivethehardened face plate 19. These faceplates are seated in the recesses, and are heldiin placeby means of; locking plates 20.

The locking plates. 20 are heldto the bodies of the gripping jaws, by means of screw bolts 21, the said bolts being passed :through openings. in i the plates, and into engagement with= threaded openings .in the gripping jaws. The inner-adjacent faces of :the face-plates .19 are roughened transplates.

(The journal pins of the gripping jaws are held inplace by meansof latch plates 22, leachof whichis pivoted to the platelfZ at one end, as indicated at 23,v and the other :end isprovided with a recess 24: in one side edge, which is adapted to engage a headed pin 25 to hold the latchplate in placevover the journal pin. The plates 22 are arranged to-swing outwardly away from each other, ztheprecesses 24: being in the inner edges of the said plates. The plates engage beneath the headsof the pins, which thus prevent upward movement of the free ends of the plates. ;A plate spring 26 is secured to the base rplate l2 adjacent to onegripping j aw, andilear, one of thelatch plates 22,13 7 means of boltsor rivets 27, and the said spring bears, at itsjfree end against the upper face of'zthe gripping, aw, acting normally to force the said jEtWzdOWIlWVfil'd.

Aurodor shaftQS isjournaled in the base jaw remote from the spring126, and the sald rod or shaft is provided at its outer end with a crank 29, for permitting the shaft to be oscillated. The inner end of the shaft is provided with an angular lug 30 for engaging beneath the adjacent gripping jaw to swing the same upwardly out of engagement with the sucker.

rod 6. The upper gripping mechanism is precisely the same as the lower, and it is supported by hangers from the lever 3.

Each of the hangers is approximately V- shaped, comprising a body 31 and arms 32 extending at an acute angle from the body with respect to each other. At its free end each arm 32 is provided with a foot 33, which is connected to the base plate of the upper gripping device by means of bolts 34. The body 31 of each of the hangers is provided with an inwardly extending journal pin 35, and each of the said journal pins is j ournaled in a notch or recess in the upper edge of the adjacent lever 3. It will be no ticed from an inspection of Figs. 3 and 4: that a slot 36 leads from the central opening of each of the base plates 12 at the end adjacent to the shaft 28.

In operation, the clamping devices are arranged as shown in Fig. 1, the lowermost device being supported by the flanges 11 of the extensions 10, while the uppermost is supported by the hangers from the levers 3. At the beginning of the pulling movement, the lowermost gripping jaws are clamped on the sucker rod. The jaws of the upper device are lifted by means of the crank 29, and the ends of the levers 3 remote from the gripping devices are moved to lower the upper gripping devices. When it has been lowered the crank 29 is moved in a direction to cause the gripping jaws to engage the sucker rod. The jaws of the lower device are now lifted by means of the crank 29, and the rod is pulled upward by means of the uppermost gripping device.

When it has been lifted as high as possible, the jaws of the lower device are engaged with the rod, and a new grip is obtained on the rod by the upper device. A succession of movements as described will finally complete the operation.

We claim:

1. A sucker rod puller, comprising a plurality of gripping devices, each consisting of a plate having a central opening, gripping jaws arranged in the opening, each of the said jaws being approximately triangular and having at one angle a pair of oppositely extending journal pins, the base plate having recesses in its upper face at the corners of the opening for receiving the journal pins, a latch plate pivoted to the base plate at each side of the central opening and at one end thereof, each plate having a recess in its inner edge at the opposite end, headed pins on the base for engagement by the notches, means for lifting one of the jaws,

jaw to lift the same,

a spring pressing the other jaw downward, and hangers connected with the base plate of one of the said devices, said hangers having inwardly extending journal pins for the purpose specified.

2. A sucker rod puller, comprising a pluralityof gripping devices, each consisting of a plate having a central opening for receiving the sucker rod, gripping jaws pivoted in the opening for swinging movement into and out of the plane of the plate, means in connection with one plate for connecting the plateto the upper end of a well casing, and means in connection with the other plate for suspending-the same from" a -pump ing jack. a

3. A sucker rod puller, comprising a plate having a central opening, a pair of gripping jaws arranged in "the opening, each jaw having a pair of oppositely extending'journal pins, and the'platehaving recesses in its upper face at the corners of the opening for receiving the journal pins, a latch plate pivoted to the plate at each side of the central opening and at one end thereof, each plate having a recess in its inner edge at its free end, and headed pins onthe base for engagement by the recesses to hold the latch plates over the journal pins.

4s. A sucker rod puller, comprising a plate having a central opening, gripping jaws arranged in the opening and pivoted to the plate, each jaw having a vertical recess in its engaging face, and the engaging face of the jaw being rough on each side of the recess, and a block held in each recess, each block being roughened at the said face, and means for detachably holding each block in the recess.

5. A sucker rod puller, comprising a plate having a central opening, gripping jaws arranged inthe opening and pivoted tothe plate, each jaw having a recess in its engaging face and the engaging face of the jaw being rough on each side of the recess, and a block held in each recess, each block being roughened on its engaging face, and means for detachably holding each block in the recess.

6. A sucker rod puller, comprising a plate 115 having a centralopening, gripping jaws arranged in the openings and pivoted to the plate, each jaw having a recess in its engaging face and a blockheld in each recess, each block having a roughened engaging face, and means for detachably holding each block in the recess. a

7. A sucker rod puller, comprising a plate having a central opening, gripping jaws pivoted in the opening, a shaft pivoted beneath the plate atone of the jaws and having a crank at its outer end and an angular portion at its inner end for. engaging the a spring secured tothe upper face of the plate adjacent to the other 130 jaw and engaging the jaw to normally press portion at its inner end for engaging the the said jaw downward. jaw to lift the same.

8. A sucker rod puller, comprising a plate JOSEPH B. DUNLAP. having a central opening, gripping jaws WILLIAM D. BRYAN. 5 pivoted in the opening, a shaft pivoted be- Witnesses:

neath the plate at one of the jaws and hav- PETER DEIGHMAN, ing a crank at its outer end and an angular J OHN YOUNG MURRY.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. G. 

